/* 基础重置与极致鲜亮风格定义 */
    :root {
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --secondary: #06b6d4;
      --accent: #f43f5e;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --container-max: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.3s;
    }

    a:hover {
      color: var(--primary-hover);
    }

    ul {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }

    section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-title {
      font-size: 2.2rem;
      text-align: center;
      margin-bottom: 15px;
      font-weight: 800;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .section-subtitle {
      font-size: 1.1rem;
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 50px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    /* 顶部导航 */
    header {
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
      height: 70px;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 100%;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo-area img {
      height: 40px;
    }

    .nav-menu {
      display: flex;
      gap: 20px;
    }

    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
    }

    .nav-link:hover {
      color: var(--primary);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .btn-nav {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white !important;
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 600;
      border: none;
      cursor: pointer;
    }

    .btn-nav:hover {
      opacity: 0.9;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Hero 首屏 - 严格无图 */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.1) 0%, rgba(79, 70, 229, 0.05) 50%, rgba(255, 255, 255, 0) 100%), #ffffff;
      padding: 100px 0;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-badge {
      display: inline-block;
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 25px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .hero-section h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 25px;
      background: linear-gradient(135deg, #1e1b4b 0%, var(--primary) 50%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.25rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 40px;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white !important;
      padding: 14px 32px;
      border-radius: 8px;
      font-size: 1.05rem;
      font-weight: 700;
      box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
    }

    .btn-secondary {
      background: white;
      color: var(--text-main) !important;
      border: 1px solid var(--border-color);
      padding: 14px 32px;
      border-radius: 8px;
      font-size: 1.05rem;
      font-weight: 700;
      transition: background-color 0.2s;
    }

    .btn-secondary:hover {
      background: var(--bg-main);
    }

    /* 数据指标卡片 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -50px;
      position: relative;
      z-index: 10;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 30px 20px;
      text-align: center;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      transition: transform 0.3s;
    }

    .stat-card:hover {
      transform: translateY(-5px);
    }

    .stat-num {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 5px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .stat-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px 30px;
      transition: transform 0.3s, box-shadow 0.3s;
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 35px rgba(79, 70, 229, 0.1);
    }

    .service-icon {
      width: 50px;
      height: 50px;
      border-radius: 10px;
      background: rgba(79, 70, 229, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 25px;
      color: var(--primary);
    }

    .service-card h3 {
      font-size: 1.4rem;
      margin-bottom: 15px;
    }

    .service-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .service-tag {
      font-size: 0.8rem;
      background: var(--bg-main);
      padding: 4px 10px;
      border-radius: 4px;
      color: var(--text-muted);
    }

    /* 流程步骤 */
    .flow-steps {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      position: relative;
      margin-top: 40px;
    }

    .flow-step {
      flex: 1;
      text-align: center;
      position: relative;
      background: var(--bg-card);
      padding: 30px 20px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
    }

    .flow-step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary);
      color: white;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 20px;
    }

    .flow-step h4 {
      font-size: 1.15rem;
      margin-bottom: 10px;
    }

    .flow-step p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 技术标准 / OpenClaw */
    .tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .tech-content h3 {
      font-size: 2rem;
      margin-bottom: 20px;
    }

    .tech-list {
      margin-top: 30px;
    }

    .tech-item {
      display: flex;
      align-items: flex-start;
      gap: 15px;
      margin-bottom: 20px;
    }

    .tech-item-icon {
      color: var(--secondary);
      font-weight: bold;
    }

    .tech-item h5 {
      font-size: 1.1rem;
      margin-bottom: 5px;
    }

    .tech-item p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* 对比评测表格 */
    .table-container {
      overflow-x: auto;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.02);
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    th, td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
    }

    th {
      background-color: #f1f5f9;
      font-weight: 700;
    }

    tr:last-child td {
      border-bottom: none;
    }

    .highlight-row {
      background-color: rgba(79, 70, 229, 0.03);
    }

    .score-badge {
      background: linear-gradient(135deg, var(--accent), var(--primary));
      color: white;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 700;
    }

    /* FAQ 折叠面板 */
    .faq-container {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background-color 0.2s;
    }

    .faq-question:hover {
      background-color: var(--bg-main);
    }

    .faq-answer {
      padding: 0 20px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      border-top: 0 solid var(--border-color);
    }

    .faq-item.active .faq-answer {
      padding: 20px;
      max-height: 300px;
      border-top-width: 1px;
    }

    .faq-icon::after {
      content: '+';
      font-size: 1.5rem;
      font-weight: 300;
    }

    .faq-item.active .faq-icon::after {
      content: '−';
    }

    /* 客户评论卡片 */
    .comments-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .comment-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 30px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.02);
    }

    .comment-meta {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-top: 20px;
    }

    .comment-avatar {
      width: 45px;
      height: 45px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .comment-user h5 {
      font-size: 0.95rem;
      font-weight: 700;
    }

    .comment-user p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 案例展示区 & 宣传图 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .case-card {
      background: var(--bg-card);
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
    }

    .case-img-container {
      width: 100%;
      background: #e2e8f0;
      position: relative;
    }

    .case-img-container img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .case-body {
      padding: 25px;
    }

    /* 资讯知识库 */
    .articles-section {
      background-color: var(--bg-card);
    }

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .article-card {
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 20px;
      transition: border-color 0.3s;
    }

    .article-card:hover {
      border-color: var(--primary);
    }

    .article-tag {
      font-size: 0.75rem;
      color: var(--primary);
      text-transform: uppercase;
      font-weight: 700;
    }

    .article-card h4 {
      font-size: 1.1rem;
      margin: 10px 0;
    }

    .article-card a {
      font-size: 0.9rem;
      font-weight: 600;
    }

    /* 表单与联系我们 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 50px;
    }

    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 30px;
    }

    .contact-method {
      display: flex;
      align-items: flex-start;
      gap: 15px;
    }

    .contact-method-icon {
      background: rgba(79, 70, 229, 0.1);
      color: var(--primary);
      width: 45px;
      height: 45px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
    }

    .contact-qr img {
      width: 130px;
      height: 130px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-top: 10px;
    }

    .form-wrapper {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.02);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 0.9rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background-color: var(--bg-main);
      color: var(--text-main);
      font-size: 0.95rem;
      transition: border-color 0.3s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
    }

    select.form-control {
      appearance: none;
      background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 16px center;
      background-size: 16px;
    }

    .btn-submit {
      width: 100%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white;
      border: none;
      padding: 14px;
      border-radius: 8px;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(79, 70, 229, 0.2);
    }

    .btn-submit:hover {
      opacity: 0.95;
    }

    /* 标签云与辅助版块 */
    .tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 20px;
    }

    .tag-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 浮动客服 */
    .floating-contact {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--bg-card);
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      position: relative;
      border: 1px solid var(--border-color);
    }

    .float-btn.primary-btn {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: white;
    }

    .float-qr-hover {
      position: absolute;
      right: 65px;
      bottom: 0;
      background: white;
      padding: 15px;
      border-radius: 8px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      display: none;
      border: 1px solid var(--border-color);
    }

    .float-btn:hover .float-qr-hover {
      display: block;
    }

    .float-qr-hover img {
      width: 120px;
      height: 120px;
      display: block;
    }

    /* 页脚 */
    footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-logo {
      margin-bottom: 20px;
    }

    .footer-logo img {
      max-height: 40px;
    }

    .footer-title {
      color: #f8fafc;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .footer-links li {
      margin-bottom: 12px;
    }

    .footer-links a {
      color: #94a3b8;
    }

    .footer-links a:hover {
      color: #f8fafc;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      margin-bottom: 20px;
    }

    .friendship-links a {
      color: #64748b;
      font-size: 0.85rem;
    }

    .friendship-links a:hover {
      color: var(--primary);
    }

    /* 移动端菜单展开状态 */
    .nav-menu.active {
      display: flex;
      flex-direction: column;
      position: absolute;
      top: 70px;
      left: 0;
      width: 100%;
      background: white;
      border-bottom: 1px solid var(--border-color);
      padding: 20px;
      box-shadow: 0 10px 15px rgba(0,0,0,0.05);
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .services-grid, .comments-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-section h1 {
        font-size: 2.2rem;
      }
      .tech-grid, .contact-grid, .cases-grid {
        grid-template-columns: 1fr;
      }
      .flow-steps {
        flex-direction: column;
      }
      .stats-grid {
        grid-template-columns: 1fr;
        margin-top: 20px;
      }
      .services-grid, .comments-grid, .articles-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }